DA-CIL: Towards Domain Adaptive Class-Incremental 3D Object Detection

Ziyuan Zhao (Nanyang Technological University),* Mingxi Xu (Nanyang Technological University), Peisheng Qian (I2R, A*STAR), Ramanpreet Pahwa (I2R), richard chang (Institute for Infocomm Research)
The 33rd British Machine Vision Conference


Deep learning has achieved notable success in 3D object detection with the advent of large-scale point cloud datasets. However, severe performance degradation in the past trained classes, i.e., catastrophic forgetting, still remains a critical issue for real-world deployment when the number of classes is unknown or may vary. Moreover, existing 3D class-incremental detection methods are developed for the single-domain scenario, which fail when encountering domain shift caused by different datasets, varying environments, etc. In this paper, we identify the unexplored yet valuable scenario, i.e., class-incremental learning under domain shift, and propose a novel 3D domain adaptive class-incremental object detection framework, DA-CIL, in which we design a novel dual-domain copy-paste augmentation method to construct multiple augmented domains for diversifying training distributions, thereby facilitating gradual domain adaptation. Then, multi-level consistency is explored to facilitate dual-teacher knowledge distillation from different domains for domain adaptive class-incremental learning. Extensive experiments on various datasets demonstrate the effectiveness of the proposed method over baselines in the domain adaptive class-incremental learning scenario.



author    = {Ziyuan Zhao and Mingxi Xu and Peisheng Qian and Ramanpreet Pahwa and richard chang},
title     = {DA-CIL: Towards Domain Adaptive Class-Incremental 3D Object Detection},
booktitle = {33rd British Machine Vision Conference 2022, {BMVC} 2022, London, UK, November 21-24, 2022},
publisher = {{BMVA} Press},
year      = {2022},
url       = {https://bmvc2022.mpi-inf.mpg.de/0916.pdf}

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